If you install UCCX 7 in VMware, you may run into this error (or something similar):
The Cisco JTAPI client versions are inconsistent. Please go to Cisco JTAPI Resync in the Unified Telephony Subsystem to install the JTAPI client.
To fix this, VNC or RDP onto your UCCX 7 server, then create a c:\winnt folder. Then, copy the java folder from c:\windows to the newly-created c:\winnt folder.
Try doing a JTAPI resync again.